Can TMTD be used as a secondary accelerator?

TMTD can be used as a single accelerator, as a secondary accelerator or as a sulfur donor in most sulfur-cured elastomers. TMTD is scorchy and gives fast cure rates. In sulfurless and EV cure systems TMTD produces an excellent vulcanization plateau with good heat aging and compression set resistance.

What is TMTD used for?

TMTD is a valuable secondary accelerator for EPDM. In the vulcanization of polychloroprene rubber with N,N'-ethylene thiourea, TMTD may be used as a retarder. Generally used as a secondary accelerator or as a booster for sulfenamides to achieve faster cure rates.

What is MBT accelerator?

MBT Fast, non-staining accelerator for both dry rubber and latex applications. Low temperature curing can be achieved by the use of TMTD, TETD or DPG as secondary accelerators. MBT confers excellent ageing characteristics to vulcanizates. Gives flat, moderately fast cures in natural and synthetic rubber.

Do rubber accelerators produce nitrosamine?

Abstract—Most of the conventional Rubber Accelerators used for curing of rubber produce Nitrosamine during and after processing (during storage). This review is to identify these accelerators and sort out the possible options to replace them with no or less producing Nitrosamine Accelerators.

What are the four types of rubber accelerators?

These four classes of rubber accelerators are: DITHIOCARBAMATE: The dithiocarbamates are secondary accelerators that are used at low phr levels in a rubber compound to “tweak” the cure system to a desired rate of cure. Examples of dithiocarbamates include ZDBC, ZDMC, ZEPC, Z5MC,

What is the chemistry of rubber cure or rubber vulcanization?

The chemistry of rubber cure or rubber vulcanization is complex. There are several rubber vulcanization systems possible based on reactions with different chemicals. The selection of an accelerator will depend on the specific vulcanizing system.